curl --request POST \
  --url https://api.iotools.cloud/v1/tool/concrete-volume-bags-calculator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "length": "10",
  "width": "10",
  "unit": "feet",
  "depth": "4",
  "bagSize": "lb80"
}
'

{
  "tool": "concrete-volume-bags-calculator",
  "tool_version": "1.0.1",
  "outputs": {
    "results": [
      {
        "metric": "Total Volume (ft³)",
        "value": "33.33"
      },
      {
        "metric": "Total Volume (yd³)",
        "value": "1.235"
      },
      {
        "metric": "Total Volume (m³)",
        "value": "0.944"
      },
      {
        "metric": "Bag Size",
        "value": "80 lb bag (yields ~0.60 ft³)"
      },
      {
        "metric": "Bags Needed",
        "value": "56 × 80 lb bags"
      }
    ]
  },
  "credits_used": 3,
  "credits_remaining": null
}